Atomizer for liquid fuel and the like



July 20 1926. v 1,593,186

J. G. M KEAN ET AL ATOMIZER FOR LIQUID FUEL AND THE LIKE Filed June 6' 1923 &

&\\\\\\\\\\\\\\\\ Patented July 20, 1926.

UNITED STATES 1,593,186 PATENT OFFICE.

JOHN GRAVES MOKEAN, MOUNT VERNON, AND ROBERT FREDERICK JONES, OF

GLASGGW,

SCOTLAND.

ATOMIZER FOR LIQUID FUEL AND THE LIKE.

Application filed June 6, 1923, Serial No. 648,674, and in Great Britain June 22, 1922.

w 1y with a space between same. A nozzle or cap having a frusto-conical shaped passage is fitted to the ends of these tubes. The diameter of the smaller end ofsaid frustoconical passage is equal to the diameter of 15 the internal bore of the inner tube and registers therewith. Tangential passages formed through the wall of the said nozzle open into the said frusto-conical passage and lie wholly on planes which are radial to the longitudinal center line of said frusto-conical passage. Vanes located between the outer surface of the said nozzle and the inner surface of the Outer tube are secured to said nozzle so that the said vanes and inner tube are capable of adjustment longitudinally within the said outer tube.

In order that our said 'nvention and the manner of carrying the same into effect or practice may be properly understood we have hereunto'appended one sheet of explanatory drawings in which Figure 1 is a secti nal elevation taken on the; line 11 of Figure 2 and Figure 2 is a sectional elevation taken on the line 2-2 of Figure 1 of an atomizer for liquid fuel and the like as constructed according to this invention.

Figure 3 is a sectional elevation, taken on the line 3-3 of Figure 4 of a slightly modifiedconstruction of atomizer. Figure 4 is an end view of the atomizer illustrated by Figure 3.

Figure 5 is an elevation of the atomizer illustrated by Figures 3 and 4 but showing the outer tube in section and illustrating the arrangement whereby the position of the nozzle and inner tube may be varied in relation to the outlet from the outer tube.

Referring to these drawings In carrying the improvements of this invention into effect or practice the atomizer consists oftwotubes a and 6 arranged concentrically one (1 inside the other I) with a space 0 between same. The one end of the tube a is connected to an oil supply pipe in any suitable manner and is provided with a suitable valve or the like (indicated at d Figure 5) in order that the flow of the liquid fuel through said tube may be controlled. At the same end the tube 6 is connected to a steam or compressed air-supply pipe in any suitable manner and is provided with a suitable valve or the like (indicated at c Fig- .ure 5) in order that the steam or compressed air supply to the space 0 may be controlled. At the other end the twoconcentric tubes (1 and b are provided with a nozzle or cap 7 which is fitted to both tubes and closes the end of the space a between same. This nozzle or cap 7 is formed with a frusto-conical shaped passage 9 which at the smaller end is in alignment with the internal bore of the tube a and which flares outwards. Passing through the wall of the nozzle or cap 7 one or more holes or passages h are formed which are adapted to conduct the steam or compressed air from the space 0 tangentially into the frusto-conical passage 9 of the.

nozzle f. The hole or holes 72. may lie-wholly on a plane radial to the tubes at and b.

In operation the liquid fuel flows in a stream through the tube a and enters the frusto-conical passage 9 at the smaller end of same where it is met by the jet or jets of steam or compressed. air issuing from the tangential holes h and swirled or rotated round the conical passage 9 and thrown-outwards in the form of a whirling spray from the larger end of said passage 9'.

If desired and according to a slightly modified arrangement illustrated by Figures 3 and 4 the nozzle or cap 7 with the frusto-conical passage 9 and tangential holes k may be so constructed and fitted to the tube a that the space a between the tubes a and b is not closed by same but in the space between the nozzle f and the inner wall of the tube 6 a plurality of vanes i may be arranged in an angled or spiral manner so that some of the steam or compressed air in the space 0 passes outwards from the end of the tube 6 in a whirling stream which surrounds the whirling spray from the frustlp-conical passage 9 of the nozzle or cap These vanes 2' may be so arranged that the direction of rotation of the whirling stream of steam or compressed air may be in the same direction as the direction of rotation of the whirling spray of fuel within same.

If desired the position of the nozzle f with 'vari the vanes i-within the tube 6 may be adjusted as indicated by Figure 5' in order that the diameter or s read of the flame issuin from the end 0 the tube 6 may be When the end face 7' of the nozzle f is in alignment with the end In of the tube 6 the flame is well spread out and when the tube a is drawn back so that the end face 7' is within the end is of the tube 5 as illustrated by Figure 5 the wall of the tube b acts to restrict the spreading tendency of the flame so that same is longer and narrower that is, it is not so well spread out but is projected further into the furnace. When the positionofthe tube a and nozzle 7 is adjusted in relation to the end of the tube 6 the tube a is secured by means. of the pinchin screw Z.

1. A11 atomizer comprising two tubes concentricallydisposed with a space therebetween; a nozzle having a frusto-conical passa e communicating with the inner of said tu and tangential passages formed in the wall of said nozzle and opening into said frusto-conical passe c, said tangential passages being dispose in a plane transverse to the longitudinal axis of said frusto-conical passage.

2.'An atomizer comprising two concentrically disposed tubes forming a s ace therebetween; a nozzle fitted to the en of the inner of said tubes and formed with a frusto-conical passage, the walls of said nozzle having tangential passages opening into said frusto-conical passage and disposed in a plane transverse to the axis of said frusto-oonical passage; and vanes disposed between said tube-s; said vanes, said nozzle and said inner tube being adjustable longitudinally of said outer tube.

3. An atomizer of li uid fuel comprising two tubes concentrica y disposed with a space therebetween; a nozzle fitted to the end of the inner of said tubes and provided with a frusto-conical passage, the smaller end of which is contiguous with the bore of the inner of said tubes, the walls of said nozzle having tangential passages opening into said frusto-conical passage and disposed in a plane transverse to the longitudinal center line of said frusto-conical passage; and vanes disposed between the outer surface of said nozzle and the inner surface of said outer tube but secured to said nozzle, saidfvanes, said nozzle and said inner tube being adjustable longitudinally. of said outer tube. 1

JOHN GRAVES MCKEAN; ROBERT FREDERICK JONES. 

